| Values for Old Faithful Area | 1975-10-19 |
|---|---|
| Astronomical Twilight Begin | 06:06 |
| Nautical Twilight Begin | 06:40 |
| Civil Twilight Begin | 07:13 |
| Sunrise | 07:43 |
| Sunset | 18:33 |
| Civil Twilight End | 19:02 |
| Nautical Twilight End | 19:36 |
| Astronomical Twilight End | 20:10 |
| Moon Illumination | 99.13% |